<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>下拉菜单</title>
    <link rel="stylesheet" href="./index.css" />
    <script src="./index.js"></script>
  </head>
  <body>
    <div class="container">
      <div class="box">
        <div class="head" id="btn">
          点击
          <span class="head-after"></span>
        </div>
        <div class="content-box">
          <div class="title">Just look at the arrow above</div>
          <div class="content">
            Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam
            nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat
            volutpat.
          </div>
        </div>
      </div>
      <div class="box">
        <div class="head" id="btn">
          点击
          <span class="head-after"></span>
        </div>
        <div class="content-box">
          <div class="title">Just look at the arrow above</div>
          <div class="content">
            Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam
            nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat
            volutpat.
          </div>
        </div>
      </div>
      <div class="box">
        <div class="head" id="btn">
          点击
          <span class="head-after"></span>
        </div>
        <div class="content-box">
          <div class="title">Just look at the arrow above</div>
          <div class="content">
            Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam
            nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat
            volutpat.
          </div>
        </div>
      </div>
    </div>
  </body>
</html>
